AGA now makes a 24″ stand alone range. They intend it as an extension piece for their larger ranges, but it functions as a complete cooktop and double oven unit by itself. My concern, besides the $6000 price tag (makes buying a 24″ Viking range for $3000 look like a breeze!!), is floor-loading issues in my historic third floor walk-up. Alas, 24″ is still too large for my kitchen: I need a 20″ model.
Read my post regarding the difficulty of finding quality small appliances in the US.